[HoonDongKang] WEEK 03 solutions #1326
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
sora0319
reviewed
Apr 19, 2025
| return dpFunc(candidates, target); | ||
| } | ||
|
|
||
| console.log(combinationSum([2, 3, 6, 7], 7)); |
There was a problem hiding this comment.
저는 백트레킹 방식을 썼는데 dp 방식으로도 할 수 있네요!!
백트레킹 보다 코드 이해는 쉽네요!
Comment on lines
+31
to
+50
| function optimizedFunc(s: string): number { | ||
| let prev2 = 1; | ||
| let prev1 = s[0] === "0" ? 0 : 1; | ||
|
|
||
| for (let i = 1; i < s.length; i++) { | ||
| let curr = 0; | ||
|
|
||
| const one = +s.slice(i, i + 1); | ||
| const two = +s.slice(i - 1, i + 1); | ||
|
|
||
| if (one >= 1 && one <= 9) curr += prev1; | ||
| if (two >= 10 && two <= 26) curr += prev2; | ||
|
|
||
| prev2 = prev1; | ||
| prev1 = curr; | ||
| } | ||
|
|
||
| return prev1; | ||
| } | ||
| return optimizedFunc(s); |
There was a problem hiding this comment.
이 방식으로 공간 복잡도도 줄일 수 있네요
저는 이것도 dp를 사용해서 공간 복잡도가 O(n)인데 저장하지 않고 바로 비교하면 더 줄이게 되네요
| let count = 0; | ||
| while (n !== 0) { | ||
| count += n & 1; | ||
| n = n >>> 1; |
There was a problem hiding this comment.
논리 연산자를 사용하는 방법이 char를 하나씩 비교하는 것보다 더 직관적인 방법 같아요!
배우고 갑니다!
sora0319
approved these changes
Apr 19, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
답안 제출 문제
작성자 체크 리스트
In Review로 설정해주세요.검토자 체크 리스트
Important
본인 답안 제출 뿐만 아니라 다른 분 PR 하나 이상을 반드시 검토를 해주셔야 합니다!